A versatile synthesis of 2-substituted 4-amino-1,2,4,5-tetrahydro-2-benzazepine-3-ones
作者:Karolien Van Rompaey、Isabelle Van den Eynde、Norbert De Kimpe、Dirk Tourwé
DOI:10.1016/s0040-4020(03)00583-0
日期:2003.6
A mild and general strategy for the synthesis of 2-substituted 4-amino-1,2,4,5-tetrahydro-2-benzazepine-3-ones is described. The seven-memberedlactam is prepared by intramolecular amide bond formation from the intermediate amino acid, which is obtained either by reductive alkylation of a variety of amines with N-Boc,N-Me-ortho-formyl-Phe and Phth-ortho-formyl-Phe, or by reductive amination of a variety
A substituted piperazine compound having the structure I:
or the structure IX:
or an enantomeric, stereoisomeric or diastereomeric form of the foregoing, and pharmaceutically acceptable salts thereof, where J, L, Q, W, A, R6, R7, z and y are as defined in the specification, and the carbon atoms marked with an asterisk can have any stereochemical configuration, which compounds bind to one or more melanocortin receptors and may be employed in pharmaceutical preparations for treatment of one or more melanocortin receptor-associated conditions or disorders, and methods for the use of the compounds of the invention.
Secondarystructures tend to be recognizable because they have repeating structural motifs, but mimicry of these does not have to follow such well‐defined patterns. Bioinformatics studies to match side‐chain orientations of a novel hydantoin triazole chemotype (1 ) to protein‐protein interfaces revealed it tends to align well across parallel and antiparallel sheets, like rungs on a ladder. One set
Incorporation of a Bioactive Reverse-Turn Heterocycle into a Peptide Template Using Solid-Phase Synthesis To Probe Melanocortin Receptor Selectivity and Ligand Conformations by 2D <sup>1</sup>H NMR
作者:Anamika Singh、Andrzej Wilczynski、Jerry R. Holder、Rachel M. Witek、Marvin L. Dirain、Zhimin Xiang、Arthur S. Edison、Carrie Haskell-Luevano
DOI:10.1021/jm101425m
日期:2011.3.10
the structural and functional consequences of the core His-Phe-Arg-Trp peptide domain using a reverse-turn heterocycle. A series of six compounds are reported that result in inactive to full agonists with nanomolar potency. Biophysical structural analysis [2D 1H NMR and computer-assisted molecular modeling (CAMM)] were performed on selected analogues, resulting in the identification that these peptide-small